ALSA: rawmidi - fix the uninitalized user_pversion
Priority LOW 18CWE-908Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-908 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: rawmidi - fix the uninitalized user_pversion The user_pversion was uninitialized for the user space file structure in the open function, because the file private structure use kmalloc for the allocation. The kernel ALSA sequencer code clears the file structure, so no additional fixes are required. BugLink: https://github.com/alsa-project/alsa-lib/issues/178
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0021 11th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15, 5.15.12, 5.16Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.14.10 to before 5.15 | 5.15 | Patch available | CNA |
| Linux | Linux | 5.15 and later | 5.15.12, 5.16 | Patch available | CNA |
- Linux VendorLinux Affected 5.14.10 to before 5.15 Fixed in 5.15 Patch available CNA
- Linux VendorLinux Affected 5.15 and later Fixed in 5.15.12, 5.16 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15 to before 5.15.12 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* | 5.16 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* | 5.16 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:* | 5.16 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:* | 5.16 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:* | 5.16 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:* | 5.16 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15 to before 5.15.12 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* Versions 5.16 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* Versions 5.16 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:* Versions 5.16 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:* Versions 5.16 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:* Versions 5.16 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:* Versions 5.16 rc6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15
- Fix · CNA Linux (Linux) Fixed in 5.15.12, 5.16
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47096
- 2026-10-03 Alias added: GHSA-5gr3-55rj-mm4c
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2021-47096 · CVE Program
- CVE-2021-47096 · NVD
- FIRST EPSS
- GHSA-5gr3-55rj-mm4c · GitHub Advisory Database · CC BY 4.0
- CVE-2021-47096 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences